Building A Dictionary Of Humpback Whale Song Units As A Tool For Assessing Stock Interactions Summary

HAL Id: hal-02547084

https://hal.archives-ouvertes.fr/hal-02547084

Submitted on 27 Apr 2020

HAL is a multi-disciplinary open access

archive for the deposit and dissemination of sci-entific research documents, whether they are pub-lished or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers.

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Building A Dictionary Of Humpback Whale Song Units

As A Tool For Assessing Stock Interactions Summary

Divna Djokic, J. Oña, Susannah Buchan, Ana Širović, Esteban Duque Mesa,

Laura May-Collado, Franck Malige, Julie Patris, C. Castro, B. Bouchard, et

al.

To cite this version:

Divna Djokic, J. Oña, Susannah Buchan, Ana Širović, Esteban Duque Mesa, et al.. Building A Dictio-nary Of Humpback Whale Song Units As A Tool For Assessing Stock Interactions Summary. World marine mammal conference 2019, Dec 2019, Barcelona, Spain. World Marine Mammal conference 2019. �hal-02547084�

H:\WMM_POSTER_DATA\Divna Whales\Divna Whales\Plots\png

Building A Dictionary Of Humpback Whale Song Units As A Tool For

Assessing Stock Interactions

Djokic, Divna , Oña, J., Buchan, S., Širović, A., Duque Mesa, E., May-Collado, L., Malige, F., Patris, J., Castro, C.,

Bouchard, B., Rossi Santos, M., Pacheco, A., Garland, E., Marcondes, M., Venturini, D., Baumgarten, J., Padovese, L.,

Gonçalves, MI., Sousa-Lima, R.

Summary:

Unit dictionary was built in

order to compare the

repertoires of humpback

whale stocks A and G,

breeding in South America, as

an indicator of their

interaction. Data were

collected in 6 different

locations on the continent, by

various researchers. The

graph is showing comparison

of unit dictionary of two

stocks in 3 consecutive

years: 2016, 2017 and 2018.

Conclusion:

Most striking observation from

the graph is the interconnection

of all the data ( of different

levels), except Brazil 2018. This is

entirely new insight into whale

culture, as connections of stocks

breeding in different oceans are

previously believed scarce.

Additionally, total disconnection

of data from Brazil 2018 directly

implies of isolated song

revolution. As all other

dictionaries are connected to

one another, it is hard to point

out the exact song evolution

flow direction. With its

revolution, 2018 Brazilian song

can be taken as a zero point for

future studies, which might give

a clue on the evolution

flow direction. Nonetheless,

cultural interaction (integrity) of

two stocks is evident.

#87

NICARAGUA

COSTA RICA

COLOMBIA

ECUADOR

PERU

BRAZIL- BAHIA

BRAZIL- ABROLHOS

SOUND

TYPE

LENGTH

SIDE

BANDS

CONTOUR

DOMINANT

𝛎

Unit characteristics

used to build the dictionary:

:

A

G

Map of South American humpback

whale breeding populations, A and

G, with data sampling locations

labeled

* Size of a node size of the dictionary

* Line width correlation strength